109528021 has 2 divisors, whose sum is σ = 109528022. Its totient is φ = 109528020.

The previous prime is 109527967. The next prime is 109528031. The reversal of 109528021 is 120825901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85655025 + 23872996 = 9255^2 + 4886^2 .

It is a cyclic number.

It is not a de Polignac number, because 109528021 - 2⁷ = 109527893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109528031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54764010 + 54764011.

It is an arithmetic number, because the mean of its divisors is an integer number (54764011).

Almost surely, 2^109528021 is an apocalyptic number.

It is an amenable number.

109528021 is a deficient number, since it is larger than the sum of its proper divisors (1).

109528021 is an equidigital number, since it uses as much as digits as its factorization.

109528021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 109528021 is about 10465.5635777535. The cubic root of 109528021 is about 478.4557154944.

The spelling of 109528021 in words is "one hundred nine million, five hundred twenty-eight thousand, twenty-one".